body {
    margin: 0;
    background: url('../../images/Power/yellow2.gif') green;
    width: 100%;
    height: 100%;
}

a {display: block; width: 100px; height: 100px; background: gray;}

span {display: block; width: 100px; height: 50px; background: gray;}

div {width: 200px; height: 100px; background: gray; position: absolute; left: 0; bottom: 0;}